Microsoft releases a new version of Power BI Desktop every month. Maintaining a portable build for each release would be a logistical nightmare for their QA team. They prioritize stability and features over portability.
Microsoft has never released, and likely will never release, a portable version of Power BI Desktop. Here is why: Power Bi Portable Version
Just because a native portable .exe doesn't exist doesn't mean you cannot work with Power BI on the go. Below are the three best strategies to achieve a portable-analyst workflow. Microsoft releases a new version of Power BI
The Power BI Portable Version is a powerful workaround for data professionals who need mobility and flexibility. While it lacks the seamless cloud integration of the installed desktop client, its ability to run without installation makes it an indispensable tool for on-the-go analytics. Microsoft has never released, and likely will never
Ready to take your data anywhere? Ensure you download your portable build from a verified source and always carry your analytics toolkit in your pocket.